[core] I intended that the Object PMC's clone method would clone the attributes. Turns out, ResizablePMCArray doesn't clone its elements, so that wasn't happening. So, this does the cloning in Object's clone vtable method. Tested with various things and nothing breaks.
[core] I intended that the Object PMC's clone method would clone the attributes. Turns out, ResizablePMCArray doesn't clone its elements, so that wasn't happening. So, this does the cloning in Object's clone vtable method. Tested with various things and nothing breaks.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@34025 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot